Institution, 8. B. S. Time measurement instruments: Symbolization of control positions.
Lua i Stíl Chicago (17ú heag.)Institution, 8096 British Standards. Time Measurement Instruments: Symbolization of Control Positions.
Lua MLA (9ú heag.)Institution, 8096 British Standards. Time Measurement Instruments: Symbolization of Control Positions.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.